So, I'm adding some Antimony support for FBC, and I'm realizing that one thing I need is a converter from ASTNodes to and from the and/or logic of GeneProductAssociations. Would it be helpful to implement this in libsbml directly, so that others could also do the same conversion? Something like:

ASTNode* GeneProductAssociation::getAssociationAsASTNode()
int GeneProductAssociation::createChildAssociationFromASTNode(const ASTNode* astn)

(tagging @fbergmann @bgoli @skeating, for any opinions)